変へん域いき

noun

domain (of a function)

In mathematics, the set of all possible input values for a function. Often contrasted with 値域 (range).

See also: 定義域

• 関かん数すう f(x) = √x の変へん域いきは x ≥ 0 です。

  The domain of the function f(x) = √x is x ≥ 0.

noun

range (of a function)

In mathematics, the set of all possible output values of a function. Note that in some contexts 値域 is more common for 'range', but 変域 can also be used.

See also: 値域

• この関かん数すうの変へん域いきはすべての実じっ数すうです。

  The range of this function is all real numbers.